Step3D

• Step[n, i, j, k] represents a special step function. Step returns 1 if the member of {i, j, k} indicated by index n is greater than the other members, 0 otherwise.

• Step is used to develop the piecewise continuous expressions used to represent the transformation of an axis with an unspecified reference direction.• Step is not defined for complex numbers.• See also: ReferenceDirection.